Prof. Clete Ferguson

Helen Dobson

Joe Hayes

Captain Lucas

Jackson Foster

Lou Gibson

George Johnson

Police Captain

Woman on Boat (uncredited)

Patrol Boat Dispatcher (voice / uncredited)

Photographer (uncredited)

The Gill Man (in water) / Lab Technician (uncredited)

Miss Abbott (uncredited)

Cop (uncredited)

Jennings (uncredited)

Skipper (uncredited)

Cop (uncredited)

Pete (uncredited)

Mac - Spotlight Party Leader (uncredited)

The Gill Man (on land) / Marineland Diver (uncredited)

Diver (uncredited)

Charlie (uncredited)

Newscaster (uncredited)

Police Announcer (uncredited)

Dr. McCuller (uncredited)

Girl in Convertible

Search Party Member (uncredited)

Policeman (uncredited)

Joe (uncredited)

Man at Tank (uncredited)

Production

Camera

Costume & Make-Up

Writing

Directing

Art

Editing

Art

Art

Art

Production

Sound

Sound

Costume & Make-Up

Sound

Sound

Sound

Sound

Costume & Make-Up

Acting

Directing

Sound

Sound

Sound

Sound

Costume & Make-Up

Crew

Sound

Production

Sound

Acting

Acting